MikeW Posted April 25, 2012 Share Posted April 25, 2012 My 1992 Toyota Winnabago has two catalytic converters installed one after another. Is this normal and would there be any advantage of pulling both of them out and putting in only one? They look like originals. Thanks Quote Link to comment Share on other sites More sharing options...
Derek up North Posted April 25, 2012 Share Posted April 25, 2012 I only see 1 converter in the '93 FSM. http://personal.utulsa.edu/~nathan-buchanan/93fsm/engine/70exhausts.pdf http://personal.utulsa.edu/~nathan-buchanan/93fsm/engine/79threeway.pdf Quote Link to comment Share on other sites More sharing options...
MikeW Posted April 26, 2012 Author Share Posted April 26, 2012 Thanks, Have you replaced the original converter and if so, did you have two installed at one time? Mike Quote Link to comment Share on other sites More sharing options...
5Toyota Posted May 1, 2012 Share Posted May 1, 2012 I bleve the other one is just a small mufler known as a resonater they are often used after the converter and a head of the main muffler. Quote Link to comment Share on other sites More sharing options...
MikeW Posted May 2, 2012 Author Share Posted May 2, 2012 Thanks for the information. My muffler is starting to show some small holes in it and I was wondering if it would make sense to swap out the two converters/resonator when I replace the muffler. Quote Link to comment Share on other sites More sharing options...
5Toyota Posted May 3, 2012 Share Posted May 3, 2012 convertors can plug up over time but they are not cheap. all catalytic convertors I have seen have a stainless steel shell. the resonator and the muffler are common steel. you can maybe replace the resonator with plain pipe. may make a little louder. some people who do not live in a smog test zone have been known to remove the cat convertor and punch the insides all out and put it back on. they bolt in place on the ends. that way it is still on there . if it's not on there the ext shop is required to reinstall it or turn you away. but if it's on there who's to know it's a empty shell. but only on ones that have only one oxygen sensor. Quote Link to comment Share on other sites More sharing options...
90toydolphin Posted May 3, 2012 Share Posted May 3, 2012 At least catalytic converters have come way down in price, under $100 is pretty common. First one I ever bought was over $300. Quote Link to comment Share on other sites More sharing options...
1LSwagger Posted March 29, 2014 Share Posted March 29, 2014 I have a 92 Dolphin 3.0 v6 and someonetook my catalytic converter I am having ahard time finding a new one. It needs to be25 3/4 in.Any advice would be much appreciated,1L Quote Link to comment Share on other sites More sharing options...
Donnie Posted March 30, 2014 Share Posted March 30, 2014 Find a good INDEPENDENT muffler specialist shop, they will be able to fit you with a generic converter....Donnie Quote Link to comment Share on other sites More sharing options...
Maineah Posted March 30, 2014 Share Posted March 30, 2014 My 1992 Toyota Winnabago has two catalytic converters installed one after another. Is this normal and would there be any advantage of pulling both of them out and putting in only one? They look like originals. Thanks Some did have back to back cats why would you want to take them off? The only advantage I could see is profit for the exhaust shop if they are not damaged. You would know right away if they were plugged up the power would be non existent the only other reason would be a rattle if the cat has come loose inside. If your state has any type of emission testing it would flunk with a gutted cat. They are stainless and run very hot so it is highly unlikely that they would rot unlike the other exhaust parts. Quote Link to comment Share on other sites More sharing options...
Donnie Posted March 30, 2014 Share Posted March 30, 2014 Way back in the stone age the thought was to take off the cat & you would have more power.. That old adage came about when leaded fuel was added to the units that had a honey comb media cat & unleaded fuel was required.......The lead would clog the cat & power was lost...They used to make a "test tube" pipe to replace the cat.. It was not legal to remove the cat, but you could install a test tube to see if you needed a new cat & most folks just left the tube in forever.....punched out the filler tube & ran leaded fuel. THOSE DAZE ARE GONE NOW...........I'm not sure where your O2 sensor is located on your truck, but if it is near the cat it will warm up faster if it is. The faster that the O2 warms up, the sooner the ECM will take over control of your timing & fuel mix...And all will be HAPPY :-)...............donnie Quote Link to comment Share on other sites More sharing options...
Gulfstream Greg Posted April 1, 2014 Share Posted April 1, 2014 Ours has two cats inline. 1991. Installed a PACESETTER - TFX PERFORMANCE KAT-BACK EXHAUST SYSTEMS It fit perfect and sounds great! Quote Link to comment Share on other sites More sharing options...
5Toyota Posted April 2, 2014 Share Posted April 2, 2014 in washington state it depends on what county you live some have required testing some do not. sombody cut the catalytic off my 4wd before i bought it i have never replaced it because in my county there is no testing. Quote Link to comment Share on other sites More sharing options...
darrel Posted April 2, 2014 Share Posted April 2, 2014 Oregon is the same way. Quote Link to comment Share on other sites More sharing options...
Maineah Posted April 2, 2014 Share Posted April 2, 2014 Maine also only the higher populated areas have testing. However a cleaner emissions engine is a much more efficient engine and we all breath better.. Quote Link to comment Share on other sites More sharing options...
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